Efficient copper-catalyzed cross-coupling of nitrogen nucleophiles with N,N-dibenzyl-4-iodobenzenesulfonamide and its application in the synthesis of Celecoxib intermediate
作者:Fui-Fong Yong、Miskal Azri、Yong-En Darrell Lim、Yong-Chua Teo
DOI:10.1016/j.tet.2020.131680
日期:2020.12
the cross-coupling of N,N-dibenzyl-4-iodobenzenesulfonamide with nitrogen nucleophiles using 0.5–20 mol% of CuI under ligand-free conditions. A variety of nitrogen nucleophiles including nitrogen heterocycles, sulfonamides and amides afforded the corresponding products in moderate to good yields (up to 98%) under the optimized conditions. The application of this catalytic system to the synthesis of Celecoxib
已经开发了一种实用且有效的策略,用于在无配体条件下使用0.5–20 mol%的CuI将N,N-二苄基-4-碘代苯磺酰胺与N亲核试剂交叉偶联。在优化的条件下,包括氮杂环,磺酰胺和酰胺在内的各种氮亲核试剂以中等至良好的收率(高达98%)提供了相应的产品。还成功证明了该催化体系在塞来昔布中间体合成中的应用。